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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=24420

jasper and xerces problem compilation

           Summary: jasper and xerces problem compilation
           Product: Tomcat 4
           Version: 4.1.29
          Platform: PC
               URL: http://comicxpert.ele.etsmtl.ca
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Jasper
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]
                CC: [EMAIL PROTECTED]


Hello, 
I have a problem since one week.
I have to upgrade an existing system working with JSP and XML files.
There is a login page written in .jsp and the login/password are written in a 
XML file.
Any time I try tu access the system (by loggin), a compilation error appear.
I'm using TOMCAT 4.1.29 and J2SDK 1.4.1_05.
It's a little bit long, but you can have a look just to the firsts lines of the 
ROOT CAUSE (and the exception)




HTTP Status 500 - 

--------------------------------------------------------------------------------

type Exception report

message 

description The server encountered an internal error () that prevented it from 
fulfilling this request.

exception 

org.apache.jasper.JasperException
        at org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:254)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:295)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:256)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:191)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke
(AuthenticatorBase.java:494)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2417)
        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:180)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:171)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:172)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:174)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service
(CoyoteAdapter.java:193)
        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:781)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnectio
n(Http11Protocol.java:549)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:589)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:666)
        at java.lang.Thread.run(Thread.java:536)


root cause 

java.lang.NullPointerException
        at org.apache.xerces.parsers.AbstractSAXParser.setErrorHandler(Unknown 
Source)
        at xpert.DocXML.loadXML(DocXML.java:80)
        at xpert.Users.checkLogin(Users.java:39)
        at org.apache.jsp.measurer_jsp._jspService(measurer_jsp.java:57)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:210)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:295)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:256)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:191)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke
(AuthenticatorBase.java:494)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2417)
        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:180)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:171)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:172)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:174)
        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex
t(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service
(CoyoteAdapter.java:193)
        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:781)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnectio
n(Http11Protocol.java:549)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:589)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:666)
        at java.lang.Thread.run(Thread.java:536)



--------------------------------------------------------------------------------

Apache Tomcat/4.1.29


It's maybe cause of the reference of the XML file. Have I to put 
c:\path_to_wath_I_want or file://c:/path_to_wath_I_want? Have I to use 
relatives links or not?
The XML file is like this : 

  <?xml version="1.0" encoding="UTF-8" ?> 
- <!--  edited with XMLSPY v5 U (http://www.xmlspy.com) by Alexandre 
(Alexandre) 
  --> 
- <users xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:noNamespaceSchemaLocation="./Xsd/users.xsd">
  <user login="nicolas" pswd="nicolas" status="admin" /> 
  </users>



Really thanks to help me resolve this problem

Nicolas Fabry

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